I am interested in the conceptual and mathematical foundations of quantum theory.
Anything, in which the structure of quantum mechanics plays a non-trivial role, really.
In recent years this has mostly been quantum information theory, but also quantum statistical mechanics and the theory of time in quantum mechanics. I like problems which are conceptually interesting and allow an answer in the form of a non-trivial theorem. As a mathematical physicist I also try to answer questions at their appropriate level of generality. Generally observed features of the theory, like, e.g., the approach of equilibrium in macroscopic systems, deserve a general explanation don't they?

Born 1954
Studies in physics: 1970-1980 in Clausthal, Marburg and Rochester NY(USA)
Doctorate 1982 with G.Ludwig
(Marburg)
Working at the Physics Department of the
University of Osnabrück:
1980-1996
Habilitation (Theoretical Physics): 1987 in Osnabrück
Feodor-Lynen Fellowship (Alexander von Humboldt Foundation, Bonn): 1988/89
Research at the
Dublin Institute of Advanced Studies: 1988-1990
Heisenberg fellowship (DFG, Bonn): 1989-1995
Professor (temporary position) at Osnabrück until August 1996
Professor at the Technical University of Braunschweig
(Institut für Mathematische Physik):
April 1997 - March 2009
Transferred to Leibniz University Hannover: April 2009,
in the wake of having been offered the Leigh Trapnell Chair of Quantum Physics at
DAMTP, Cambridge